Thomas donahue



(No Model.)

T. DONAHUE.

KEY.

d :Il

Du I1.

W/TNESSES.'

A TTOHNE' YS,

' tofore used, and one that can be made in much UNITED STATES PATENT OEEICE.

THOMAS DONAHUE, OF HAMPSHIRE, ASSIGNOR, BY MESNE ASSIGNMENTS, TO ADELBERT J. IVARNER, OF CHICAGO, ILLINOIS.

KEY.

SPECIFICATION forming part of Letters Patent No. 553,578, dated January 28, 1896. Application filed April 4, 1895. Serial No. 544,451. A(No model.)

To all whom it may concern:

Beit known that I, THOMAS DONAIIUE, of I-Iampshire, in the county of Kane, State of Illinois, have invented an Improved Key and the Method of Making the Same, of which the following is a specification.

This invention relates to ,that class of keys for locks in which the shank, bow and bit are struck from one piece of thin sheet metal, enlarged at the bit end to form a cylindrical spindle. I-Ieretofore in constructing keys of this class they have usually been made with a rear extension or projection oii the bit portion, which passed through an opening in the rear side of the ferrule and was then riveted down to connect the said ferrule and bit. This requires considerable vtime and labor, and when accomplished the riveted end must be ground down and polished.

The object of my invention is to avoid these objections and provide a key which shall be simpler, neater, and stronger than thosehereless time.

With these and such other objects as may appear my invention consists in the details hereinafter described and claimed.

In the drawings forming a part of this specification, Figure l is a view showing my improved key. Fig. 2 is a View showing the component parts of my keynviz., the blank, rivet or ferrule, and the face of solder-wire. Fig. 3 is a sectional view on the line 3 3 of Fig. 1. Fig. 4 shows the construction of the rivet or ferrule.

The blank A is stamped or struck from the sheet metal and comprises in one piece the bow a, shank a', bit a2, and spindle connection a3. The spindle portion d3 is made somewhat narrower in diameter'than the required spindle, and in the rear edge of said portion 0,3 is made an indentation recess or notch B.

G represents the ferrule which its upon the spindle portion as and forms the cylindrical spindle of the desired size, said ferrule being grooved longitudinally, as shown at c, to receive the spindle connection a3, and near its end is the shoulder c, necessary in this class of keys. The end of ferrule or rivet resting upon the shank of key can be finished in any style desired. Before the ferrule or rivet is itted upon the spindle a piece of cold wiresolder D is filled into the indentation or notch B, vsaid piece of a length equal to the length of the notch. After the ferrule or rivet is placed upon the spindle portion and over the solder, the end is heated sufficiently to melt the solder, which not only fills the recess but flows around and unites the spindle portion and ferrule,andthus forms a cylindrical spindle portion free from all roughness, and one that requires no further finishing.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is-

As an improved article of manufacture, a key, composed of a shank, bit, and spindle portions, and formed from a single piece of sheet metal, the rear edge of said spindle portion having a recess therein intermediate its ends, a fusible metallic body, located in said recess, and a ferrule or rivet slotted longitudinally and attached to the spindle and embracing said spindle and metallic body, substantially as shown and described.

In testimony whereof I affix my signature in the presence of two Witnesses.

THOMAS DONAHUE.

Witnesses: Y

EDITH G. HEALEY, JosEPrI WARNER. 

